Use stricter type checking in UMA_HISTOGRAM_ENUMERATION

chrome/browser/chromeos/app_mode/kiosk_app_launch_error.cc

 // Copyright 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "chrome/browser/chromeos/app_mode/kiosk_app_launch_error.h"
 
 #include "base/metrics/histogram_macros.h"
 #include "chrome/browser/browser_process.h"
 #include "chrome/browser/chromeos/app_mode/kiosk_app_manager.h"
 #include "chrome/grit/generated_resources.h"
@@ skipping 84 matching lines @@
 }
 
 // static
 void KioskAppLaunchError::RecordMetricAndClear() {
   PrefService* local_state = g_browser_process->local_state();
   DictionaryPrefUpdate dict_update(local_state,
                                    KioskAppManager::kKioskDictionaryName);
 
   int error;
   if (dict_update->GetInteger(kKeyLaunchError, &error))
-    UMA_HISTOGRAM_ENUMERATION("Kiosk.Launch.Error", error, ERROR_COUNT);
+    UMA_HISTOGRAM_ENUMERATION("Kiosk.Launch.Error", static_cast<Error>(error),
+                              ERROR_COUNT);
   dict_update->Remove(kKeyLaunchError, NULL);
 
   int cryptohome_failure;
   if (dict_update->GetInteger(kKeyCryptohomeFailure, &cryptohome_failure)) {
-    UMA_HISTOGRAM_ENUMERATION("Kiosk.Launch.CryptohomeFailure",
-                              cryptohome_failure,
-                              AuthFailure::NUM_FAILURE_REASONS);
+    UMA_HISTOGRAM_ENUMERATION(
+        "Kiosk.Launch.CryptohomeFailure",
+        static_cast<AuthFailure::FailureReason>(cryptohome_failure),
+        AuthFailure::NUM_FAILURE_REASONS);
   }
   dict_update->Remove(kKeyCryptohomeFailure, NULL);
 }
 
 }  // namespace chromeos